An open problem we wish to handle is to compare results by
reaction-diffusion systems in populations competition, as in
[1]}, [2]}, [3]}, [4]}, [5]}, [6]}, [7]}, and results obtained
by differential games theory contained in [8]}, [9]}
(see also the references therein), in order to reach a better
understanding of the territoriality of the competing
species or groups (see also [10]}).
